MESON Chess Problem Database

Problem Display
PID: 66975 (6n1/b6P/R2Nb3/3pR3/2Nk4/B7/3K4/8 w - - 0 1)

Lebedev, Aleksandr N

Mochalkin, Oleksandr Viktorovich

1/2 Prize, Chervoni Girnik, 1996

6n1/b6P/R2Nb3/3pR3/2Nk4/B7/3K4/8

#2

7 + 5

5417 FIDE Album (1995-1997) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Bb2#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Sb5#
      • 1...dxc4
        • 2.Bb2#
      • 1...Bd7!
    • 1.Rc6?
      • threat
        • 2.Sb5#
        • 2.Bb2#
      • 1...Bc5
        • 2.Bb2#
        • 2.Bxc5#
      • 1...dxc4!
    • 1.h8Q?
      • threat
        • 2.Re4#
      • 1...dxc4
        • 2.Sb5#
      • 1...Sf6!
    • 1.h8B?
      • threat
        • 2.Re4#
      • 1...dxc4
        • 2.Sb5#
      • 1...Sf6!
  • Keys
    • 1.Ra5!
      • threat
        • 2.Bb2#
      • 1...dxc4
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(d);SBLOCK::B(B)
  • Tries
    • Try
      • R(E);
      • Threat
        • S(F)
      • Vars
        • P(b);P_SPINP(b),XS(C)::B(B)
      • Refutation
        • B(c);
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XS(C)
    • Try
      • P(G);
      • Threat
        • QAB(G)+R(D),DCHECK
      • Vars
        • P(b);SBLOCK,XS(C)::S(F)
      • Refutation
        • S(e);
    • Try
      • P(G);
      • Threat
        • B(G)+R(D),DCHECK
      • Vars
        • P(b);SBLOCK,XS(C)::S(F)
      • Refutation
        • S(e);
  • Actual
    • R(E);
    • Threat
      • B(B)
    • Vars
      • P(b);N_GUARD,XS(C)::R1(D)
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